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From: Syfo-Dyas on 27 Oct 2009 14:08
Hi,

A friend of mine has an intel cpu 8400 and I would like to know what
is the closest AMD equivalent to that processor. Another friend wants
the same or similar power and speed but hates intel. So he only wants
or prefers AMD. Do any of you experts on here know of the AMD
equivalent in power and speed of an intel 8400 3.0Ghz processor???

Thanks in Advance
From: Paul on 27 Oct 2009 15:32
Syfo-Dyas wrote:
> Hi,
>
> A friend of mine has an intel cpu 8400 and I would like to know what
> is the closest AMD equivalent to that processor. Another friend wants
> the same or similar power and speed but hates intel. So he only wants
> or prefers AMD. Do any of you experts on here know of the AMD
> equivalent in power and speed of an intel 8400 3.0Ghz processor???
>
> Thanks in Advance

There is a difference between single threaded and multi threaded
performance. A lot of software is single threaded, and doesn't
use multiple cores. So you can't rely on having more cores,
as a crutch for insufficient core clock speed.

One problem with benchmarks, is their emphasis on multi-threaded
performance (gaining benefit from multiple cores). Tomshardware charts
don't give a description of what a test might be testing. As far as I know,
only something like the iTunes benchmark might be single threaded. Using
a single threaded benchmark, is to make sure a lot of single threaded
stuff performs at the same level.

http://www.tomshardware.com/charts/2009-desktop-cpu-charts/iTunes-8.1.0.52,1405.html

The E8400 3GHz finished the benchmark in 101 seconds. The
fastest AMD processor in the charts (green lines) is

AMD Phenom II X4 965 (Deneb 4c) 133 seconds
3.4 GHz, DDR3-1333, 2 MB L2, 6 MB L3

That means at 3.4GHz, it is running at 76% of the E8400.
You would have to overclock it to 3.4*(1 / 0.76) = 4.47GHz.

On hwbot.org, I can see some 965 systems overclocked to 4.2GHz
on air cooling. There are some on liquid nitrogen cooling
running at 6.2GHz. So if that 3.4GHz AMD processor was
overclocked as far as it would go on air cooling, then in
single threaded benchmarks it would come close to the E8400.

In multi-threaded, it might be easier to catch up, by
pitting an AMD quad against an Intel dual core. So if you
wanted to make the claim that the 965 was "just as good" as
the E8400, it might be true in cases where all four cores
could be made to work on a problem at the same time.

AMD is competitive on the low to mid range, but at the
very highest end, Intel is the winner. You buy AMD to
save a few bucks.

Paul

From: Dave C. on 28 Oct 2009 03:50
On Tue, 27 Oct 2009 14:08:47 -0400
Syfo-Dyas <Syfo-Dyas(a)nomail.com> wrote:

> Hi,
>
> A friend of mine has an intel cpu 8400 and I would like to know what
> is the closest AMD equivalent to that processor. Another friend wants
> the same or similar power and speed but hates intel. So he only wants
> or prefers AMD. Do any of you experts on here know of the AMD
> equivalent in power and speed of an intel 8400 3.0Ghz processor???
>
> Thanks in Advance

The closest performance match in a processor that is still widely
available is a Phenom II X3 720 (2.8GHz) which benchmarks slightly
better, even though it is slightly slower clock speed. Obviously the
extra core helps the Phenom II. But the interesting thing is, the
Phenom II X3 720 is significantly cheaper than an E8400. So if it's
E8400 performance you want, get a Phenom II X3 720 for less money.
Invest the savings in a better video card, perhaps? -Dave
From: Paul on 28 Oct 2009 16:19
Dave C. wrote:
> On Tue, 27 Oct 2009 14:08:47 -0400
> Syfo-Dyas <Syfo-Dyas(a)nomail.com> wrote:
>
>> Hi,
>>
>> A friend of mine has an intel cpu 8400 and I would like to know what
>> is the closest AMD equivalent to that processor. Another friend wants
>> the same or similar power and speed but hates intel. So he only wants
>> or prefers AMD. Do any of you experts on here know of the AMD
>> equivalent in power and speed of an intel 8400 3.0Ghz processor???
>>
>> Thanks in Advance
>
> The closest performance match in a processor that is still widely
> available is a Phenom II X3 720 (2.8GHz) which benchmarks slightly
> better, even though it is slightly slower clock speed. Obviously the
> extra core helps the Phenom II. But the interesting thing is, the
> Phenom II X3 720 is significantly cheaper than an E8400. So if it's
> E8400 performance you want, get a Phenom II X3 720 for less money.
> Invest the savings in a better video card, perhaps? -Dave

From hwbot.org

E8400 SuperPI 32M @ stock 3GHz speed. 15min 59sec 130ms

http://www.x-cade.com/uploads/Supes/Superman/AllBenchmarks/E8400/SPI_32m/STOCK_15m_50_125s.jpeg

To match that result, a 720 Black Edition has to overclock to 4.3GHz,
from its stock 2.8GHz.

http://hwbot.org/result.do?resultId=858581

On single threaded applications, it isn't quite the same.

Sure, on multithreaded applications, you may be able to take
your favorite AMD processor having more cores than the Intel,
and beat it. But not every application a person does, is
multithreaded. So it depends on how you want to delude yourself.

This is one of the reasons I hate Tomshardware benchmarks,
because they're designed to deceive people. Most of the
software I have is single threaded. Windows Movie Maker
output module is one of the exceptions. Or perhaps
Photoshop (and not on all Photoshop filters, as some
of the filters are single threaded).

For games, it would be best to check a benchmark
for the specific game. Some games are slightly
multithreaded (one main thread running 100%,
some helper activity at lower percentage points).
Some, like FSX, launch threads on the fly, leading
to multicore usage. It is hard for game designers
to use any arbitrary number of cores offered by a
user, as there is only so much parallelism you
can extract from a game.

Paul
From: jpsga on 28 Oct 2009 17:15

"Syfo-Dyas" <Syfo-Dyas(a)nomail.com> wrote in message
news:ujdee5lgr1kn98o92qst2hc8dusprs9adt(a)4ax.com...
> Hi,
>
> A friend of mine has an intel cpu 8400 and I would like to know what
> is the closest AMD equivalent to that processor. Another friend wants
> the same or similar power and speed but hates intel. So he only wants
> or prefers AMD. Do any of you experts on here know of the AMD
> equivalent in power and speed of an intel 8400 3.0Ghz processor???
>
> Thanks in Advance

How about the new Athlon II 250. Same speed � the price.

JPS


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